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Which of the following situations of altered perfusion could be triggered by chronic obstructive pulmonary disease?

A.

Ventilation perfusion mismatching

B.

Impaired cardiac output

C.

Impaired circulation

D.

Excessive cardiac demand

Answer and Explanation

The Correct Answer is A

A. In chronic obstructive pulmonary disease (COPD), airflow obstruction leads to ventilation-perfusion (V/Q) mismatching. This means that some parts of the lungs may receive air but not enough blood flow, or vice versa, resulting in inefficient gas exchange and reduced oxygenation. This is a hallmark of COPD.  

B. While COPD can eventually affect the heart, particularly leading to right heart failure (cor pulmonale), it does not directly impair cardiac output in the early stages. The primary issue in COPD is with lung function.  

C. COPD does not directly impair circulation but can lead to pulmonary hypertension and strain on the circulatory system over time. However, impaired circulation is not the primary issue triggered by COPD.  

D. COPD may lead to increased work of breathing, but it does not directly cause excessive cardiac demand in the same way that conditions like anemia or sepsis might.  


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Related Questions

Correct Answer is B

Explanation

A. Insulin is secreted by beta cells of the pancreas, not alpha cells. Therefore, a lack of alpha cells would not affect insulin secretion.

B. Alpha cells of the pancreas are responsible for secreting glucagon, which helps raise blood glucose levels by promoting the release of glucose from the liver. Without alpha cells, glucagon secretion would be impaired.

C. Somatostatin and gastrin are secreted by delta cells and G cells, respectively, not alpha cells. Therefore, a lack of alpha cells would not prevent the secretion of these hormones.

D. Pancreatic polypeptides are secreted by F cells in the pancreas, not alpha cells. Therefore, a lack of alpha cells would not affect the secretion of pancreatic polypeptides.

Correct Answer is D

Explanation

A. When performing hand hygiene, the hands should be held lower than the elbows to allow water to flow downward, preventing the contamination of the forearms.

B. The water temperature should be warm, but not hot, to prevent skin irritation. Extremely hot water is not necessary for effective hand hygiene.

C. Hands and arms should be rubbed together to create friction during hand washing. However, drying should be done with a clean paper towel or air dryer, not by rubbing the hands and arms together.

D. The correct amount of liquid soap for hand hygiene is typically 4 to 5 mL. This is the appropriate amount to ensure effective coverage and cleaning of the hands.

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